[INFO] fetching crate yaml-front-matter 0.1.0...
[INFO] testing yaml-front-matter-0.1.0 against beta-2022-02-22 for beta-1.60-1
[INFO] extracting crate yaml-front-matter 0.1.0 into /workspace/builds/worker-104/source
[INFO] validating manifest of crates.io crate yaml-front-matter 0.1.0 on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate yaml-front-matter 0.1.0
[INFO] finished tweaking crates.io crate yaml-front-matter 0.1.0
[INFO] tweaked toml for crates.io crate yaml-front-matter 0.1.0 written to /workspace/builds/worker-104/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ced09458c05631bea05d3cc864ae491aa1caaab9d304fc55529116ce4269de11
[INFO] running `Command { std: "docker" "start" "-a" "ced09458c05631bea05d3cc864ae491aa1caaab9d304fc55529116ce4269de11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ced09458c05631bea05d3cc864ae491aa1caaab9d304fc55529116ce4269de11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ced09458c05631bea05d3cc864ae491aa1caaab9d304fc55529116ce4269de11", kill_on_drop: false }`
[INFO] [stdout] ced09458c05631bea05d3cc864ae491aa1caaab9d304fc55529116ce4269de11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 298d32cbf0c9a732b1c12de961a0138c64e5e5845bc455f3942252e0d57b2bc5
[INFO] running `Command { std: "docker" "start" "-a" "298d32cbf0c9a732b1c12de961a0138c64e5e5845bc455f3942252e0d57b2bc5", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling serde_derive v1.0.136
[INFO] [stderr]    Compiling serde v1.0.136
[INFO] [stderr]    Compiling serde_yaml v0.8.23
[INFO] [stderr]    Compiling yaml-front-matter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.78s
[INFO] running `Command { std: "docker" "inspect" "298d32cbf0c9a732b1c12de961a0138c64e5e5845bc455f3942252e0d57b2bc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "298d32cbf0c9a732b1c12de961a0138c64e5e5845bc455f3942252e0d57b2bc5", kill_on_drop: false }`
[INFO] [stdout] 298d32cbf0c9a732b1c12de961a0138c64e5e5845bc455f3942252e0d57b2bc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 181b1d425f60d8667dd3e3fb826f241d5d080956840c82f7857a2bece63e253f
[INFO] running `Command { std: "docker" "start" "-a" "181b1d425f60d8667dd3e3fb826f241d5d080956840c82f7857a2bece63e253f", kill_on_drop: false }`
[INFO] [stderr]    Compiling yaml-front-matter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `__private::doc`
[INFO] [stdout]    --> src/lib.rs:165:30
[INFO] [stdout]     |
[INFO] [stdout] 165 |     use serde::{Deserialize, __private::doc};
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]    --> src/lib.rs:164:1
[INFO] [stdout]     |
[INFO] [stdout] 164 | mod test {
[INFO] [stdout]     | ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.07s
[INFO] running `Command { std: "docker" "inspect" "181b1d425f60d8667dd3e3fb826f241d5d080956840c82f7857a2bece63e253f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "181b1d425f60d8667dd3e3fb826f241d5d080956840c82f7857a2bece63e253f", kill_on_drop: false }`
[INFO] [stdout] 181b1d425f60d8667dd3e3fb826f241d5d080956840c82f7857a2bece63e253f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 02c2cfbea866d451165730f7b1e1b42b07a19e49115cc03cf733f049bbdb6bf8
[INFO] running `Command { std: "docker" "start" "-a" "02c2cfbea866d451165730f7b1e1b42b07a19e49115cc03cf733f049bbdb6bf8", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `__private::doc`
[INFO] [stderr]    --> src/lib.rs:165:30
[INFO] [stderr]     |
[INFO] [stderr] 165 |     use serde::{Deserialize, __private::doc};
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stderr]    --> src/lib.rs:164:1
[INFO] [stderr]     |
[INFO] [stderr] 164 | mod test {
[INFO] [stderr]     | ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `yaml-front-matter` (lib test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.60s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/yaml_front_matter-0a0bfe4efb420934)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test::parses_markdown_into_document ... ok
[INFO] [stdout] test test::retrieve_markdown_front_matter ... ok
[INFO] [stdout] test test::retrieve_markdown_content ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests yaml_front_matter
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 8) ... ignored
[INFO] [stdout] test src/lib.rs - (line 29) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 1.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "02c2cfbea866d451165730f7b1e1b42b07a19e49115cc03cf733f049bbdb6bf8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "02c2cfbea866d451165730f7b1e1b42b07a19e49115cc03cf733f049bbdb6bf8", kill_on_drop: false }`
[INFO] [stdout] 02c2cfbea866d451165730f7b1e1b42b07a19e49115cc03cf733f049bbdb6bf8